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Considering transaction cost, Hedger's attitude to risk, variance of foreign exchange rate , with Von Neumann Morgenstern utility function and Bernoulli principle, this paper analyses optimal hedging of the foreign exchange risk during the import/export with forward/future contracts, and the influence of the above mentioned factors on the optimal hedge rate.

本文在前人研究基础上，考虑交易费用，决策人对风险的态度，汇率相对风险大小等因素，用Von Neumann- Morgenstern效用函数和 Bernoulli决策法则建立了研究利用远期/期货和约做外汇套期保值问题的一般模型，然后具体分析了一种典型情况下的最优套期保值率的性质。

This approach will enable the different investors bear the risk, and access to the corresponding rewards. The first two methods did not consider investors attitudes of risk and the expected price of the spot or futures. However, the hedger of the maximize effectiveness calculates the optimal hedge ratio through the establishment of investors utility function and calculus.

前面两类方法都没有考虑投资者的风险态度和对现货或者是期货价格走势的预期，而效用最大化套期保值通过建立投资者的效用函数，再利用微积分求最值的方法来计算最优套期保值比率。

Howeer, these sites carry a small risk of hemothorax and pneumothorax.1 Ultrasound guidance for internal jugular cannulation significantly reduces the number of attempts required and the risk of complications.

然而，但这些部位有发生血胸和气胸的小风险这句话根本不像"指南"或者"规范"的翻译，你看国内的指南有这么说话的吗？

But the rest of the risk rating of 8 high-risk bonds how to do?

可是剩下的风险等级8的高风险债券怎么办呢？

The high lever of the financial derivative and high risk, in addition to the imperfect of the financial market, the incomplete of the laws and regulations make the risk of the financial derivative higher and having the expanding effect.

金融衍生工具的高杠杆性和高风险性，再加上金融市场的不健全、法律法规不配套以及监管体制不完善等因素的共同作用，使金融衍生工具交易的风险更高并且有扩大效应。

In white participants, the 1919T allele was associated with increased risk of stroke and cardioascular mortality, and in black participants, homozygosity for the 790T allele was associated with a fourfold increased risk of MI compared with homozygosity for the 790A allele.

在白人参与者中，1919T等位基因与中风和心血管病死亡率的危险增加有关，而在黑人参与者中，790T等位基因的同合子性比790A等位基因的同合子性与心肌梗死危险的关系高四倍。

Some risk precaution measures are put forward in this paper on the basis of the risk analyses of housing mortgage loan at present.

文章在分析当前住房按揭贷款风险的基础上，提出了几点防范措施。

The HPFS reported that risk factors associated with an increased risk of CaP mortality were a higher incidence of CaP, an increased likelihood of poor prostate tumor differentiation, a preferential increase in the progression of highly differentiated tumors, or an increase CaP death rate independent of incidence stage at diagnosis or grade.

该hpfs报道说，相关风险因素增加的风险上限，死亡率较高发病率的上限，增加的可能性穷人前列腺肿瘤分化，以优惠的增加，在循序渐进的高度分化的肿瘤，或提高上限死亡率独立的发病率这个阶段，诊断或职系。

Kim Huk Su, executive secretary for the United Nations Economic and Social Commission for Asia and the Pacific, said that there are two major priorities for the new regional forum - the need for tools to support Integrated Water Resource Management, and "radically" more effective risk management and risk prevention.

亚太经社会执行秘书金学洙则表示，新成立的区域性论坛将有两大课题需优先讨论：其一是发展出「整合式水资源管理」的运用工具，其二是更有效的风险管理与风险预防议题。

There are many risk factors of CHD,hyperlipemia is the most risk one among them.

在冠心病的众多发病因素中，高脂血症与其关系最为密切。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。